Texas Instruments AN-1574 LM5073, User Manual, Page: 3 / 19

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Connection and Custom Configurations
Figure 1. The Evaluation Board Layout
Table 1. Jumpers
Jumper Function
Short for Aux dominant.
JMP1
Open for non-Aux dominant.
Short pins 1 and 2 to produce startup bias voltage directly from RAUX
input.
JMP2
Short pins 2 and 3 to produce startup bias voltage through linear regulator.
Open all pins when above two functions are not required.
Short pins 1 and 2 to select the simple RAUX inrush limit by resistor.
JMP3 Short pins 2 and 3 to select low loss RAUX input inrush limit by MOSFET.
Either of the two settings must be selected.
Short pins 1 and 2 to use common mode input filter.
JMP4, JMP5 Short pins 2 and 3 to bypass common mode input filter.
Either of the two settings must be selected.
Short pins 1 and 2 to use the differential input filter.
JMP6 Short pins 2 and 3 to bypass the differential input filter.
Either of the two settings must be selected.
Short to activate the PoE power indicator LED.
JMP7
Open to not select the PoE power indicator LED.
Short pins 1 and 2 to select external pull up for the SD pin by Vcc.
JMP8 Short pins 2 and 3 to select external pull up for the nSD pin by Vcc.
Open all pins when no external pull up is required.
JMP9, JMP11, JMP12, Short to connect the PD interface with the onboard buck regulator.
JMP13 Open when an external DC-DC converter is used.
3 SNVA214A – April 2007 – Revised April 2013 AN-1574 LM5073 Evaluation Board
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